Thermomicroscopic arrangement



Nov. 28, 1933.

HHHHHH mmmml lhm H. R] EPERT THERMOMI CROS COPIG ARRANGEMENT Filed June 22, 1932 2 Sheets-Sheet l w w 5 9 1M5 K E E w i E W Z i N INVENTOR ermznb Zia ev ATTORNEY Nov. 28, 1933. RIEFERT THERMOMICROSCOPIC ARRANGEMENT Filed June 22, 1932 2 Sheets-Sheet 2 ATTORNEY Patented Nov. 28, 1933 1,937,206

1,923? ,Zllfi THERMOMICRQSCQPEC ARRANGEMENT Hermann Riepert, Wetzlar, Germany, assignor to the firm: Ernst Leitz, @ptische Werlre, Wetzlar, Germany Application June 22, 1932, Serial No. 618,680, and in Germany July 20, 193i 3 Claims. (Cl. '73-32) UNITED s This invention relates to a thermo-microscope substituted by a circular aperture if so desired for the photographic registry of the refractory or required. and fusibility reactions of a melting body, and In front of the photographic plate holder and it is the principal object of my invention to sheet g, a transparent or translucent plate can provide a thermal-microscope which is combined be arranged which carries a system of coordiwith a mirror galvanometer, and illuminating nates designated g, and the field of view revealsource, and an electric furnace and is used for ing the melting body under observation on said the photographic registry of the refractory and sheet is designated h. fusing phenomena of a melting body together In operation the entire apparatus is mounted 10 with the temperatures at which they occur. on a triangular rail k and secured thereto by Another object of my invention is the provision means of the clamp screws Z. 1t rests upon a of a thermo-microscope for the photomicrotable or other suitable support m supported by graphic projection of a melting body by the inthe springs 11, to avoid disturbances by shocks etc. termediary of a slitted diaphragm or circular The source of light is preferably a lamp of 15 iaphragm inserted into the ocular of a microlow voltage allowing a regulation for any de-, scope and in front of a galvanometer mirror. sired degree of brightness, The electric furnace A further object of my invention is the proviis adjustable to allow the insertion of the body sion of athermo-microscope in whichacalibrated to be melted, and allows the regulation of the scale sheet is arranged in front of a photographic temperatures according to requirement. The 20 plate, while the arrangement of a frosted or microscope is adjustable in the direction of its colored plate behind the photographic plate perhorizontal axis by the operation of the screw q mits the observation of the reactions and pheand the objective forms an image of the melting nomena during the process of melting of a body body in the furnace. The fusing point of the and for reading the prevailing temperatures on thermo-couple must be in the same plane as the 25 the scale sheet. melting body and will also appear in the pro- A still further object of my invention is the jected image. The slit in the slider allows the provision of a thermo-microscope in which interprojection of a small portion of the image. The changeable. slitted and circular diaphragms are bellows camera and the mirror galvanometer are arranged in the ocular of the microscope in order arranged upon a common supporting bracket 1 30 to allow the sharp focusing of thermo-couple and and t e m ge p j t through th S t s admelting body with the large field revealed by the justed by means of a set screw to appear on the vcircular diaphragm and the subsequent photocalibrated scale of the sheet in the plate holder graphic registry with the narrow field revealed at the zero points of the coordinate system. by the-slotted diaphragm. The wires of the thermo-couple are attached to '35 These and other objects and advantages of the pole screws of the. galvanometer. The plate my invention will become more fully known as holder contains the light sensitive sheet covered at the description thereof proceeds. and will then its front by the calibrated and graduated frosted be specifically defined in the appended claims. plate carrying the net of coordinates; the photo- In the accompanying drawings forming a ma. graph will therefore show the net of this frosted '40 terial part of this disclosure: plate simultaneously with the melting curve.

Fig 1 is a perspective View of a thermmmicrm The mirror of the galvanometer turns correscope constructed according to my invention. Sponding 130 the temperature d v p d in the Fig. 2 is a diagrammatic View f the Same furnace and the picture projected through the Fig 3 is a detail View of a diaphragm shden slit will appear at the proper place on the frosted 45 plate. In this manner the timely height of the 1 As illustrated, in front of a source of light a, an illuminating lens p is arranged, and between the same and a microscope c, J, and electric body during the progress of its melting (ordinates) depending upon the temperature prevailing (abscissa) will appear in the picture, as the roecfumace b filth a meltng f and tion of the melting body through the micl osdope l Th are Tne furnace 15 located is deflected by the galvanometer, so that .the within an electric circuit N. while the thermoheight, of the melting body is projected on the t t 00111318 15 Connected by means of Conductors sheet with the temperature measurement and as i with a mirror galvanometer e. The ocular of the temperature measurementmoves to the right the microscope has interchangeably interposed with increased temperature, the height of the 55 therein a slider (1 having a slit which may be melting body decreases.

It is possible to observe the progressing process by using a red glass plate behind the light sensitive sheet and a light-proof box attachment, and to simultaneously read the temperature of the furnace on the scale of the frosted plate so that the application of a special thermometer is not necessary.

It will be understood that I have described and shown the preferred form of my apparatus only as one example of the many possible waysto practically construct the same, and that I may make such changes in its general arrangement and in the ccnstruction of its minor details ascome within the scope of the appended claims without departure from the spirit of my invention and the principles involved.

Having thus described my invention, what I claim as new and desire to'secure by Letters Patent is:

1. A'thermo' microscope comprising a source of light and an illuminating lens, a microscope, an electric furnace containing a fusing body arranged between said lens and the microscope, a thermo-couple, a slitted diaphragm interchangeably interposed in the ocular of the microscope, a mirror galvanometer connected to said thermocouple, and a sensitive sheet upon which the image of the fusing body is projected by the intermediary of said diaphragm and the mirror galvanometer.

2. A thermo-microscope comprising a plate holder, a sensitized sheet in said holder and a calibrated and graduated plate in front of said sheet, and means for projecting the picture of the melting body upon said sheet for the reading of the prevailing temperatures on the scale, said means comprising a microscope, an illuminating lens, an electric furnace for melting a body between said lens and the microscope, a thermocouple, a mirror galvanometer connected with. said thermo-couple, a slider within the ocular of the microscope.

3. In a thermo-inicroscope of the class described, a regulable lamp of low voltage and an illuminating lens, a microscope adjustable in the direction of its horizontal axis, an electric furnace between said lamp and lens and the microscope, a camera the objective of which forms an image of the body melting insaid furnace, a. thermo-couple having its fusing point in the same plane as the melting body, a slotted slider interchangeably interposed in the ocular\ of the microscope, a mirrored galvanometer connected to said thermo-couple and turning corresponding to the temperature developed in the furnace, a common base for the camera and said galvanometer, a plate held in said camera, containing the light sensitive sheet, and a calibrated and graduated frosted plate covering the front of said sensitive sheet and carrying a net of coordinates.

HERMANN RIEPERT. 

